JT,
On your Chest Tri workout, you're hitting the pecs with all the right exercises/angles (Incline, Decline and Flat). I would suggest moving to MORE dumb bell BPs vs the bar. Dumb Bell BPs employ less shoulder muscle and will give you more focus on the Pecs. I don't know your set or rep count but as you know for leanness, increasing both will get you there. Add CABLE FLYs!!! I find these great for definition. You can do a set or two at the beginning to open up the pecs and a good closing for a nice burn at the end. Also, do upper, mid and lower cable flys to hit all the angles again.
Try super setting and go to 5-6 sets with rep counts in the 15 - 20 range. Adjust the weight as needed so you are pushing to finish on the final set(s) and reps. Also, mix it up every other wo with pyramid schemes.
As for the triceps, I like to finish chest workouts with seated dips, which work the lower pecs and tris so you get a 2 for 1 bonus. I finish with cable tri push downs and preacher tri cep curls on a tri machine. Keep in mind that bench presses are working the tricep too, so you just need a few at the end for a nice finish.
Not sure if you do cardio or not. It will help on achieving leanness. If not, definitely recommend super setting, high rep count with weights that go to, or close to, failure and minimal rest in between sets. Trust me this will feel like you did an hour of cardio.
Finally, try increasing your protein intake and cutting back on carbs. The increase protein will help keep muscle mass already achieved and the lowering carbs for leanness will help with the definition.
I know this is basic info and stuff you may know, but just my two cents and what tends to work for me.
Good luck